Why I get frustrated.

I reported in my last post I booted to XFCE from the ISO on the USB. FF kept going off on me. Then I got stuck. Nothing would move. Could not Ctrl/Alt/backspace or Ctrl/Alt/Delete. Nothing moved.
Just had to go to the button and turn whole thing off.
I booted again from the USB this time into LX. But when I got there my mouse was frozen. I could Ctrl/Alt/Backspace and get in but mouse was still stuck. So I did a Ctrl/Atl/Delete hoping to reboot. But up comes a small box that said something like "Control Manager of something" And the boxes just kept multiplying. There must have been 25 or more scattered around.
I finally had to shut down with the button.

Then I sat down and rested ....... then mopped the floor.
While I was resting and
out of the blue, my husband shows me a flyer ad from Office Max about some CD-r. I hadn't even mentioned I was looking for anything. (I was going to gently mention the fact

) I looked and in the same ad was:
Memorex 16x DVD+/R 50 pack now $12.99. Is this what I need? If it is, it seems a better price than what was in your links. What would I do with 50?
http://www.officemax.com/technology/drives-memory-storage/hard-drives-usb-drives